Messages in this thread | | | Date | Tue, 25 Dec 2001 05:33:19 -0500 | From | Paul Boley <> | Subject | Re: severe slowdown with 2.4 series w/heavy disk access |
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Alan Cox wrote: > > > total used free shared buffers > > cached > > Mem: 417472 412192 5280 0 20632 > > 315680 > > Thyose values dont show any problems. In fact your machine seems to think it > had a ton of free memory to waste and has let it fill up with stuff that has > been accessed - just on the chance that it may be reused. > > It hasn't even felt enough memory pressure to start swapping. When you > say it "becomes slow", what precisely becomes slow ?
When this happens in X, the mouse drags and skips, any processes running (like tar/gzip. ls in an empty dir takes about 10 seconds) slow down, and it happens usually for about 10sec-2min, often for no apparent reason. The big decompression was just a way I can easily duplicate it. Oddly enough though, according to top, it caches all that memory at once, and my free goes down to 5 megs, with the system hanging/slow to respond, for 10sec-2min. Even typing in the console has delay before the characters appear, and according to top, tar and gz are both using under 1% cpu while this happens, and about 50% of the cpu is in use by the system (not by any processes that I can see. kupdated goes up to about 0.3% during this)
> > Also what disks do you have and how are they set up ? > -
/dev/hdb3 on / type ext2 (rw) /dev/hdb4 on /home type ext2 (rw) /dev/hda1 on /dos/c type vfat (rw) /dev/hdb1 on /dos/d type vfat (rw) none on /dev/pts type devpts (rw,gid=5,mode=620) none on /proc type proc (rw)
and my swap is /dev/hdb2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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